Door butt hinge



1965 L. HILTUNEN ETAL 3,

DOOR BUTT HINGE Filed July 29, 1963 2 Sheets-Sheet 1 INVENTORS LAURIH!LTUNE N PAAVQ VALISALO b- 1, 1965 HILTUNEN ETAL 3,231,929

DOOR BUTT HINGE Filed July 29, 1963 2 Sheets-Sheet 2 INVENTORS LAURIHILTUNEN & PAAVO VALISALO A TWP/VFW United States.- a en 3,231,929 DOORBUTT HINGE Lauri Hiltunen, Lake Worth, Fla. (Box 649, Geraldton, WesternAustralia, Australia), and Paavo Valisalo, 404 NW. 25th St.,Gainesville, Fla.

Filed July 29, 1963, S,er No. 298,080 1 Claim. (Cl. 15-171) Thisinvention concerns a novel door hinge construction.

According to the invention the hinge has two hinge plates which can beattachedrespeetively to a door and adoo jamb- E he h n e pla ef n b terally semi-circular. recess or mortise in either the door or door jamb.The hinge plates are provided with ridges which precisely locate theplates with respect to the edges of the door and door jamb. The platewhich is to be set into. a, recess. is, preferably provided with acentered projeeting pm which serves to locate the mortising or drillingcenter for forming the recess.

In one form. of. the invention, one hinge plate has. a recessformedtherein for, receiving the other hinge plate in a nested, andflush arrangement. The hinge plate which is to be mounted on the doormay be. provided with a projecting bearing shaft or rod, which fits intoa sleeve integral with the ther h n e. plate for th r. ia b- Inside thesleeve is a ball bearing which supports the shaft so that the doorswings freely with respect to thedoor jamb.

In another form of the invention, interfitting eyes or Sleeves are prvidesion the h n P ate u h hic extends emo able p It is therefore oneobject of the invention to provide a door hinge construction in whichcircularly curved hinge plates are employed with. ridges. for locatingthe plates with respect to edges of a door and door jamb.

A further object is. to provide a door hinge as described withprojecting pins at one side of. one or. both hinge plates to serve asthe center of drilling for mortising tool.

Yet another object is to provide a novel closure cap for the knucklestructure of the hinge. I

Still another object is to provide a door hinge with hinge platesincluding a shaft rigidly held by one plate and fitting into a sleeverigidly held by the other plate, with a ball bearing in the sleeverotatably supporting the shaft to permit free turning movement of theplates with respect to each other.

For further comprehension of the invention, and of the objects andadvantages thereof, reference will be had to the following descriptionand accompanying drawings, and to the appended claims in which thevarious novel features of the invention are more particularly set forth.

In the accompanying drawings forming a material part of this disclosure:

FIG. 1 is a front elevational view of a hinge embodying the invention,the hinge shown mounted on a door and a door jamb in open position.

FIG. 2 is an exploded rear perspective view of parts of the hinge ofFIG. 1.

FIG. 3 is a top plan view of the hinge in a closed position.

FIG. 4 is a sectional view of the hinge taken on line 44 of FIG. 1 butwith the hinge plates in closed position.

FIG. 5 is an elevational view of a door and door jamb showing recessesformed to receive parts of the hinge.

FIG. 6 is a side View of part of a mortising tool which may be used toform the recesses of FIG. 5.

FIG. 7 is a side view of a hinge embodying a modified form of theinvention in closed position.

FIG. 8 is an exploded perspective View of parts of the hinge of FIG. 7.

FIG. 9 and FIG. 10 are top plan views of the hinge plates of FIG. 7. I

FIG. 11 is a sectional view taken on line 11-11 of FIG. 7 but with thehinge shown mounted on a door and. iamb- Refcrring in detail to thedrawings, in FIG. 1 there is shown a hinge embodying the invention andindicated generally at 20 This hinge has two hinge plates 22 and 24?.Hinge plate 22% is intended for mounting on end face F of a door jarnbJ. The plate 22 has a circularly curved body portion 25 which isslightly more than semicircular. Three counter-sunk holes 26 areprovided for receiving screws 27 to secure the body portion 25 in asemicircular recess or mortise 28 formed in the door jamb. The plate hasa side flange 30 which abuts side S of the door jamb. A pointedprojection 28 is located at the rear face of the plate. This projectionis located at the center of curvature of recess 28 and of the plate22*}. Plate 22 carries an integral sleeve 34 having an axial bore 35 inwhich is set a hardened ball bearing 36. The axis of the sleeve isparallel to the lateral edge 37 of the plate. The plate body 25 fitsinto circularly curved shallow recess 28% whose depth equals that of theplate body so that the front face of the plate body is flush with endface F of the door jamb; see FIG. 4,

Hinge plate 24 is also circularly curved. Plate 24 has a lateral ridgeor flange 44 which fits snugly against the side S of door D. The plate24? has countersunk holes 45 to receive screws 46 which secure the plateto the door. The plate fits into a circularly curved shallow recess 65whose depth equals the thickness of plate body 42*. Rear pointedprojection 32 locates the center of curvature of the recess 65. Theouter face of plate 24 fits flush with end face F of door D.

Plate 2.4 carries a laterally extending sleeve 48 in which is set ahardened cylindrical shaft 49 having a concave recess 50 at its end. Theshaft fits snugly into sleeve bore 35 and the bottom end of the shaftrests on the top of ball bearing 36. Adjacent edges 51 51 of the sleeves34, 48 are slightly spaced from each other as the shaft rides on theball bearing. Due to this thrust bearing arrangement, the door turnsfreely with respect to the door jamb. One or more other similar hingeassemblies 20 will be provided between the door and door jamb to supportthe door properly in a vertical plane with respect to the vertical doorjamb.

In order to form the recesses 28 and 65, plates 22 and 24 can serve astemplates. By pressing the plate 22* against the door jamb with flange30 at the edge of the jamb projection 32' will mark the door at a pointwhich will be the center of curvature of the recess to be formed. Then amortising tool such as shown in FIG. 6 can be used to drill the recess.This tool can be driven by a manually operated brace or by a motordriven chuck in which the tool will be engaged. The tool may be providedwith an externally threaded point P and shoulder 62 which limits thedepth of cut of the tool to a distance D which is the distance betweencutting edge 61 and shoulder 62.

FIG. 5 shows recesses 28 and 65 formed in the end faces F and F of doorjamb I and door D to receive the plates 22 and 24 of hinge 20 The holes28' and 65' are formed by point P of tool 60 (FIG. 6) which cuts therecesses. These holes are marked by the pointed projections 32 32 of thehinge plates which serve as templates for this purpose.

FIGS. 7-11 show another hinge 20 having two hinge plates 22 and 24 Thesemicircular body 25 of plate 22) has a ridge 30 on its rear face forengaging the side S of door jamb J" as shown in FIG. 11. A projectingpin 32' serves to locate the center of curvature in recess 28' formed inend face F of jamb 1. Two aligned sleeves or eyes 70 70 are provided toreceive in axial alignment the sleeve 72 of plate 24*. A pin 71 fits inthe aligned bores 74, 75, 76 of the interfitted sleeves 70 72 and 70respectively. A closure cap 77 with a stud 78 can be force fitted intothe bottom end of sleeve bore 76.

Hinge plate 24 has a ridge 44 formed at its rear side for engaging atthe intersection of the face S and edge F of door D". Other parts of thehinge corresponding to those of hinges 20 and 20 are identicallynumbered. Projecting pin 32" is provided on the rear side of plate body42.

It will be noted that all of the hinges are provided with ridges orflanges at their rear faces for locating the lateral edges of the hingeplates in alignment and flush with the surfaces of the door and doorjamb. The hinge 20 provides a more freely swinging assembly because ofthe ball bearing arrangement. In addition, the door can easily be liftedoff the door jamb when the door is open since the depending shafts 49slide out of the sleeves 34 held on the door jamb. In hinge 20 the pin75 must be removed to disengage the hinge plates 22 24 The hinge platescan be made by mass production metal working machinery at low cost. Theyare strong, durable and readily replaced. They are arranged for quicklocating of mortises when required. These hinge plates can be installedmuch quicker and more accurately than conventional rectangular hingeplates.

While we have illustrated and described the preferred embodiments of ourinvention, it is to be understood that we do not limit ourselves to theprecise constructions herein disclosed and that various changes andmodifications may be made within the scope of the invention as definedin the appended claim.

Having thus described our invention, what we claim as new, and desire tosecure by United States Letters Patent is:

A door hinge of the character described comprising a pair ofsubstantially similar hinge plates one of which is adapted to be securedin fixed position to a door jamb and the other of which is adapted to besecured in fixed position to a door; each of said hinge platescomprising a fiat semi-circular body section, an integral verticallydisposed sleeve, and a vertically extending shoulder which is disposedbetween said body section and said sleeve; the

body section of the said one of said hinge plates being adapted to bemounted in a complementary countersunk recess in said door jamb with thesaid shoulder thereof engaging the outer corner of said door jamb; thesaid sleeve of the said one of said hinge plates having an axialdownwardly extending bore therein with a hardened ball bearing disposedin the bottom thereof; the said body section of the said other of saidhinge plates being adapted to be mounted in a complementary countersunkrecess in said door with the said shoulder thereof engaging a corner ofsaid door; the said sleeve of the said other of said hinge plates havingan upwardly extending axial bore therein in which a hardened pivot shaftis secured, said shaft extending downwardly from said sleeve into thesaid sleeve bore of the said one of said hinge plates with the lower endthereof engaging said ball bearing; each of said body sections having asmall sharp pointed projection which extends outwardly from the rearsurface thereof at the center of curvature thereof to facilitate thecountersinking of the complementary recesses in which said body sectionsare mounted.

References Cited by the Examiner UNITED STATES PATENTS 174,639 3/1876Parsons 16-128 290,464 12/ 1883 Carnall 16-128 424,565 4/1890 Miller-119 1,098,634 6/1914 Neighbors 16-167 1,190,435 7/1916 Lowden 16-1281,332,768 3/1920 Simmons 16-128 2,188,928 2/1940 Stolle 145-1192,272,241 2/1942 Fendring 292-340 2,618,010 11/1952 Helz 16-1362,748,420 6/ 1956 Clover 16-136 2,867,840 1/1959 Peterson 16-1683,081,482 3/1963 Guerrant 16-128 FOREIGN PATENTS 1,079,619 5/ 1954France.

15,061 1889 Great Britain. 380,549 7/ 1931 Great Britain. 567,342 10/1957 Italy.

JOSEPH D. SEERS, Primary Examiner.

DONLEY J. STOCKING, Examiner,

